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| #include <stdio.h>
#include <malloc.h>
#include "Polynomial.h"
static void clear(Polynomial *This);
static int isEmpty(Polynomial *This);
static int length(Polynomial *This);
static void print(Polynomial *This);
static int appendElem(Polynomial *This, ElemType e);
Polynomial *InitPolynomial(){
Polynomial *L = (Polynomial *)malloc(sizeof(Polynomial));
Node *p = (Node *)malloc(sizeof(Node));
L->This = p;
p->next = NULL;
L->clear = clear;
L->isEmpty = isEmpty;
L->length = length;
L->print = print;
L->appendElem = appendElem;
return L;
}
Polynomial *CreatePolynomial(ElemType *params,int length){
Polynomial *L = InitPolynomial();
int i;
for(i=0;i<length;i++){
L->appendElem(L, *(params+i));
}
return L;
}
void DestroyPolynomial(Polynomial *L){
L->clear(L);
free(L->This);
free(L);
L = NULL;
}
static void clear(Polynomial *This){
Node *p = This->This->next;
Node *temp = NULL;
while(p){
temp = p;
p = p->next;
free(temp);
}
p = This->This;
p->next = NULL;
}
static int isEmpty(Polynomial *This){
Node *p = This->This;
if(p->next){
return 0;
}else{
return 1;
}
}
static int length(Polynomial *This){
int j = 0;
Node *p = This->This->next;
while(p){
j++;
p = p->next;
}
return j;
}
static void print(Polynomial *This){
Node *p = This->This->next;
if(p){
printf("%fx^%f", p->elem.coefficient,p->elem.exponent);
p = p->next;
}
while(p){
printf(" + %fx^%f", p->elem.coefficient,p->elem.exponent);
p = p->next;
}
printf("\n");
}
static int appendElem(Polynomial *This, ElemType e){
Node *p = This->This;
Node *temp = (Node *)malloc(sizeof(Node));
if(!temp) return -1;
while(p){
if(NULL == p->next){
temp->elem.coefficient = e.coefficient;
temp->elem.exponent = e.exponent;
p->next = temp;
temp->next = NULL;
}
p = p->next;
}
return 0;
}
Polynomial *addPolynomial(Polynomial *pa,Polynomial *pb){
Polynomial *L = InitPolynomial();
ElemType a,b,sum;
Node *ha = pa->This->next;
Node *hb = pb->This->next;
while(ha&&hb){
a = ha->elem;
b = hb->elem;
if(a.exponent > b.exponent){
L->appendElem(L, b);
hb = hb->next;
}else if(a.exponent == b.exponent){
sum.exponent = a.exponent;
sum.coefficient = a.coefficient + b.coefficient;
if(sum.coefficient != 0){
L->appendElem(L, sum);
}
ha = ha->next;
hb = hb->next;
}else{
L->appendElem(L, a);
ha = ha->next;
}
}
while(ha){
a = ha->elem;
L->appendElem(L, a);
ha = ha->next;
}
while(hb){
b = hb->elem;
L->appendElem(L, b);
hb = hb->next;
}
return L;
}
Polynomial *subPolynomial(Polynomial *pa,Polynomial *pb){
Polynomial *L = InitPolynomial();
ElemType a,b,sub;
Node *ha = pa->This->next;
Node *hb = pb->This->next;
while(ha&&hb){
a = ha->elem;
b = hb->elem;
if(a.exponent > b.exponent){
sub.exponent = b.exponent;
sub.coefficient = -b.coefficient;
L->appendElem(L, sub);
hb = hb->next;
}else if(a.exponent == b.exponent){
sub.exponent = a.exponent;
sub.coefficient = a.coefficient - b.coefficient;
if(sub.coefficient != 0){
L->appendElem(L, sub);
}
ha = ha->next;
hb = hb->next;
}else{
L->appendElem(L, a);
ha = ha->next;
}
}
while(ha){
a = ha->elem;
L->appendElem(L, a);
ha = ha->next;
}
while(hb){
b = hb->elem;
sub.exponent = b.exponent;
sub.coefficient = -b.coefficient;
L->appendElem(L, sub);
hb = hb->next;
}
return L;
}
Polynomial *kMulPolynomial(Polynomial *pa,ElemType a){
Polynomial *L = InitPolynomial();
Node *ha = pa->This->next;
ElemType temp;
while(ha){
temp.exponent = ha->elem.exponent + a.exponent;
temp.coefficient = ha->elem.coefficient * a.coefficient;
L->appendElem(L, temp);
ha = ha->next;
}
return L;
}
Polynomial *mulPolynomial(Polynomial *pa,Polynomial *pb){
Polynomial *temp = InitPolynomial();
Polynomial *temp1 = NULL,*temp2 = NULL;
Node *hb = pb->This->next;
while(hb){
temp1 = kMulPolynomial(pa,hb->elem);
temp2 = addPolynomial(temp1,temp);
DestroyPolynomial(temp1);
DestroyPolynomial(temp);
temp = temp2;
hb = hb->next;
}
return temp;
}
|
